Rock blade for bulldozers



y 1937. s. s. ALLIN ET AL ROCK BLADE FOR BULIJDQZERS Filed Nov. 26, 1935 @Hmwmm M INVENTOR I4 1. 1. IN 0025 P. FLYNN n ATTORNEYJ Patented May 25, 1937 UNITED STAT/ES ROCK BLADE FOB. BULLDOZERS George S. Allin, Seattle, Wasln, and Theodore Patrick Flynn, Portland, Oreg.

Application November 26, .1935, Serial No. 51,640

.3 Claims.

This invention relates to improvements in ripper and bucker equipment, and it has reference more particularly to an improved form of blade that is designed for use especially on bulldozers, or similar machines; which blade is equipped with road ripping teeth mounted in a manner whereby a roadway may be torn up and whereby rocks, roots, etc., may be combed from the liner material.

More specifically stated, thepresent invention resides in the provision of a rock blade, including a mold board whereby a plurality of teeth are mounted for the ground ripping and combing action, and which teeth are adjustably mounted and are removable for replacement or sharpening.

It is also an object of this invention to provide for reversal of the teeth to adapt the machine either to a pushing or dragging action by the tractor.

It is also an object of the invention to provide a machine that is especially useful for brush bucking and piling.

Other objects of the invention reside in the details of construction and in the combination of parts and in their mode of operation, as will hereinafter be described.

In accomplishing these and other objects of the invention, we have provided the improved details of construction, the preferred forms of which are illustrated in the accompanying drawing, where- Fig, 1 is a perspective view of a bulldozer equipped with a blade made in accordance with the present invention.

Fig. 2 is a front elevation of the blade.

Fig. 3 is a plan view of a part of the blade, illustrating its connection with a mounting means.

Fig. 4 is a cross section, on the line 4-4 in Fig. 2.

Referring more in detail to the drawing- The present blade comprises an elongated mold board I of metal plate construction, wherein a vertical face plate 2 has horizontal base and upper plates 3 and 4 welded longitudinally thereto 'on its back side to give strength and rigidity. At the ends, and at spaced intervals therealong, are vertical brace webs 5 welded in place, and above the plate 4 are triangular gussets 6 backing up the top edge of the face plate 2.

Secured to the front wall 2 of the mold board, and spaced therefrom is a vertical plate I held in .place by webs 8 and 8' arranged intermediate the plates l and I in pairs to receive the mounting shanks of the teeth, presently described, therebetween and the pairs of webs are so spaced as to locate the teeth, in this instance, approximately one foot apart.

- .Each tooth comprises a. straight mounting shank I0 and a forwardly and downwardly curved foot Illa terminating in a point lb. The teeth are held in place by inserting the. shanks upwardly between webs 8 and 8', and then securing them in fixed positions of adjustment by pins l2 extended through alined openings in the webs and teeth shanks. Each tooth shank has a plurality of holes l3 in the upper end portion of its shank to provide for setting the tooth in different positions of vertical adjustment and to hold it by insertion of a pin 12 therethrough.

In the use of this blade with ordinary types of tractors, it is mounted at a point intermediate its ends on a pivot pin I 5 extended vertically through the mold board brace plates and through the vertex or forward end of a supporting frame l6 mounted to embrace the tractor and which frame also comprisesbrace beams I! located at opposite sides of the track frames l8 of the tractor and with forward ends pivotally attached to the ends of mold board by pins l9 and with their rearward ends. secured adjustably to the side members of frame It. The rear end of frame It is pivotally secured to the tractor and its forward end is vertically adjustable by a-lever mechanism designated at 20, thereby to regulate the elevation of the teeth above, or within the ground.

The present tractor does not form any particu- I lar part of the invention per se, but only as a part of a combination, and it may be any of the common types. As here shown, the frame which supports the blade and the lever mechanism for adjusting it corresponds to that construction of the pending application of George S. Allin. filed on November 25, 1933, under Serial No. 699,759. The blade, by slight modification in mounting means, is suitable for use with various kinds of tractors and interchangeably with bulldozer blades.

The teeth of theblade operate as the teeth of the ordinary ground ripper and are adjustable in the mold board. Also, they may be easily and readily removed when this is necessary for repair or replacement.

It is a feature of this invention that the ripper teeth may be reversed in their mounted position soas to point rearwardly instead of forwardly. In this latter position their operation -is practically the same, except that the tractor drags the teeth through the ground instead of pushing them machine is adapted particularly to brush bucking, and when a pile of brush has been accumulated in front of the blade, it may be lifted and transported on the teeth to some point of disposition.

It is contemplated also that means shall be provided in connection with this blade for retaining the brush pile on the teeth, or that the blade shall be made to tilt upwardly to facilitate holding the pile of brush thereon.

Having thus described our invention, what we claim as new therein and desire to secure by Letters Patent is- 1. The combination with a tractor, of a frame supported from and extended forwardly of the tractor, a mold board mounted by the frame at its forward end and extended transversely of the tractor in a substantially vertical plane, a plurality of ground ripping teeth with vertical shanks adjustably fixed in the mold board and having forwardly directed feet at their lower ends, and means on the tractor for vertically ad- Justing said frame to elevate or lower the teeth into the ground.

2. A machine of the character described, comprising a tractor, a blade mounting frame attached to the tractor and extended forwardly thereof and vertically adjustable at its forward end relative to the tractor, and a ripper blade supported by said frame forwardly of the tractor and comprising a mold board with vertical guideways formed therein at spaced intervals along the board and teeth having shank portions vertically adjustably contained in the guideways and means for locking the shanks at different positions of vertical adjustment.

3. A machine as recited in claim 2 wherein each of the teeth comprises a forwardly directed foot formed at the lower end of the shank and extended to an extent whereby it will serve to support a load when the frame is in raised position.

GEORGE S. ALLIN. THEODORE PA'I'RICK FLYNN. 

